Hahahahaha, the manufacturer has taken a popular *chicken coop* design and relabelled it to sell for *rabbits*, that is hysterical!
(What goes around comes around, I guess... since it used to be that people often bought things designed as *rabbit hutches* to repurpose for chickens...)
Being as it is a pretty common coop design, yes, it works fine for chickens
All it is, you know, is a shed (coop) built with WIRE instead of plywood/siding on the sides. If you are going to remove the solid enclosed coop part and make it all wire, you really really ought to add some diagonal bracing otherwise it will tend to collapse parallelogram-style in storms; and you really need to ground-anchor it in some fashion especially if you want to expand it to 8x24'. (You do realize it will not be *moveable* at that dimension, yes?)
But, basically, sure, people do that all the time. Get yourself some shed plans for an 8'-wide shed, expand it lengthwise to 24', build it as per the plans you've got except don't install siding and put hardwarecloth (or whatever) on instead. Add diagonal bracing and anchor it very firmly to the ground, and there ya go.
It won't be real cheap, but it will certainly look nice.
Good luck, have fun,
Pat